fix travis build issue

This morning, I found that all the c++ build job related to "TOOLSET=asan" returns an error, even we try to rebuild the old jobs which already passed:

Debug w/ @springmeyer, we thought this is a new Travis error due to a new leak in node.js.

To fix this issue we need to add echo "leak:node::Start" >> ${SUPPRESSION_FILE} in scripts/sanitize.sh

diff --git a/scripts/sanitize.sh b/scripts/sanitize.sh
index 4168cca..28c9344 100755
--- a/scripts/sanitize.sh
+++ b/scripts/sanitize.sh
@@ -24,6 +24,7 @@ SUPPRESSION_FILE="/tmp/leak_suppressions.txt"
 echo "leak:__strdup" > ${SUPPRESSION_FILE}
 echo "leak:v8::internal" >> ${SUPPRESSION_FILE}
 echo "leak:node::CreateEnvironment" >> ${SUPPRESSION_FILE}
+echo "leak:node::Start" >> ${SUPPRESSION_FILE}
 echo "leak:node::Init" >> ${SUPPRESSION_FILE}
 export ASAN_SYMBOLIZER_PATH=$(pwd)/mason_packages/.link/bin/llvm-symbolizer
 export MSAN_SYMBOLIZER_PATH=$(pwd)/mason_packages/.link/bin/llvm-symbolizer

OR see this PR https://github.com/mapbox/node-cpp-skel/pull/156/files.

This will fix the issue.

cc w/ @mapbox/maps-api @flippmoke @mapsam @millzpaugh

scripts/sanitize.sh と TOOLSET=asan を使用する Travis ジョブから始めます。Sanitizer の suppression エントリを参照されている node-cpp-skel pull request と比較し、その後、影響を受ける C++ ASAN ビルドを再実行するか調査します。ASAN ジョブが報告された Node.js のリーク失敗なしに完了すれば完了です。